> JavaScript ECMA-262: around 250 pages, most of which is just water. One day reading. No new concepts are introduced over anything that existed 30 years ago,

> JavaScript ECMA-262: around 250 pages, most of which is just water. One day reading. No new concepts are introduced over anything that existed 30 years ago, so it does not require any learning, just knowing where to look for a reference. > client side frameworks Who need to learn the libraries? They must have some documentation, I suppose. And again, I really doubt any of those managed to introduce a fundamentally new concept which was not known 30 years ago. > but haven't monitored the developments of the language and best practices for the last 3 years The safest assumption is that nothing really changed. > I like data science I.e., statistics, a > 100 years old science.